This is a baseband WebSDR receiver, located in a rural area of the German uplands (Sauerland), using an e-field probe similar to the PA0RDT MiniWhip. The radio bandwidth of 48 kHz is converted directly by an ADC with 96 kHz sampling rate.
The whole thing is part of the PA3FWM WebSDR project and operated by Sabine, DL1DBC. Read more ...

*** For fast setup listening to RSDN-20 (Alpha), please use the "Alpha" and "Z" buttons!

It seems you are using a mobile device; click here to switch to the mobile version of this site.
It seems Java is not installed or disabled on your computer. You need to install and/or enable it for this website to work properly.
Since Java version 7u51, Java needs to be enabled separately for each website; see for instructions.
Your browser does not seem to support HTML5 WebAudio; please try a recent version of Firefox, Chrome, Opera or Safari; or switch to Java.

Allow keyboard:
j k ← →: freq down/up (+shift/ctrl/alt faster)
u l c a f: USB, LSB, CW, AM, FM
z Z: center/zoom waterfall
g: enter frequency


Peak value: ? dB
mute squelch auto-notch

Signal strength plot:
Frequency: kHz

? Hz @ -6 dB
? Hz @ -60 dB

Waterfall view

This WebSDR is currently being used by ? user(s) simultaneously:      compact view

This chatbox is intended to discuss the operation of the WebSDR.
The operators of this site disclaim any responsibility for text appearing in this chatbox.